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oai:www.ideals.illinois.edu:2142/19323 2023-07-10 col_2142_5131 col_2142_14828 com_2142_5130 com_2142_14827 com_2142_14793 com_2142_8903

Crofts, Antony R. Wang, Zhenggan 2011-05-07T12:03:54Z 2011-05-07T12:03:54Z 10000-01-01 1990 The kinetics and thermodynamics of the high potential chain in the chromatophores from Rhodobacter sphaeroides have been reexamined. It was found that RC, cyt c$\sb2$ and c$\sb1$ after a flash reached a state not far from the expected ideal equilibrium under the conditions of our experiments. An extinction coefficient for cyt b$\sb{\rm H}$ was computed from comparison of oxidation kinetics of c cytochromes in the presence of antimycin and UHDBT. The effects of myxothiazol on the cyt c oxidation have also been discussed. Our observations of the temperature dependence of cyt b reduction suggested that quinone diffusion was more rapid than turnover of the bc$\sb1$ complex, and that the chemical step of quinol oxidation was the rate-limiting step in the photosynthetic electron transport of chromatophore system. Oxidation kinetic of quinol by bc$\sb1$ complex in chromatophores was simulated. A set of kinetic parameters were obtained from optimization, and compared with experimental results. A minimal model of quinol oxidation was proposed, and discussed under the context of the Q-cycle mechanism. Made available in DSpace on 2011-05-07T12:03:54Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026347.pdf: 5107740 bytes, checksum: 9b8555e980c9de07dfcf0a88a5fd8290 (MD5) Previous issue date: 1990 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:36:10Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:14:31-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9026347 (UMI)AAI9026347 http://hdl.handle.net/2142/19323 eng Copyright 1990 Wang, Zhenggan Biophysics, General Quinol oxidation by the ubiquinol:cytochrome c(2) oxidoreductase in the chromatophores from Rhodobacter sphaeroides text Biophysics and Computational Biology Biophysics University of Illinois at Urbana-Champaign Dissertation Ph.D.